203412 2019-10-25 07:38:57 -0700 [GTK][WPE] Cover area for sticky elements is not updated when async scrolling is enabled (default behavior) 2021-01-13 01:40:56 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 219776 P2 Normal --- 202449 1 psaavedra webkit-unassigned clord zan oldest_to_newest 1583801 0 psaavedra 2019-10-25 07:38:57 -0700 Scrolling inside of the sticky elements with fixed position is still not working fine for all the situations. For example: https://people.igalia.com/psaavedra/scroll.html. In this example, the scroll inside the `div` element is consistent but when you does a scroll in the body element it seems the fixed position element doesn't manage the offset correctly resulting in a displacement in the opposite direction of the scrolling action The same doesn't happens disabling the async scrolling: ``` export WEBKIT_DISABLE_ASYNC_SCROLLING=OFF ``` Related to: https://bugs.webkit.org/show_bug.cgi?id=202449 1586906 1 psaavedra 2019-11-04 01:06:46 -0800 The issue is much more likely to the drawn area for the sticky scrollable element not being extended as we reaching the end of the initial cover area for the generated tiles for this layer resulting in a blank rendered page as we are doing scrolling down over it. 1587341 2 psaavedra 2019-11-05 01:36:17 -0800 There are another thing that it worth to mention here. The scrolling for the overflow scrollable element only works when the body element is not scrolled (position 0,0). 1713883 3 clord 2020-12-11 04:51:38 -0800 I expect the bug would have been initially 'fixed' by bug 218974 and then hopefully will stay fixed after bug 219776. I'll look now and if it isn't, endeavour to fix it. 1713896 4 clord 2020-12-11 07:04:10 -0800 Can confirm this works fine with bug 219776 applied. *** This bug has been marked as a duplicate of bug 219776 *** 1719229 5 psaavedra 2021-01-13 01:40:56 -0800 (In reply to Chris Lord from comment #4) > Can confirm this works fine with bug 219776 applied. > > *** This bug has been marked as a duplicate of bug 219776 *** Nice!. Thanks for take care about this. Really cool to have this working in WPE at last.